VCard (Contact Card) parser and generator.

Valet helps you write the sophisticated command-line interfaces you're so used to from GNU/Linux. It provides a beautiful API, rich template support, smart configuration, man page generator, and many other useful features. No matter how large or complex your application is, Valet tops it off with...

Automatically validate ActiveRecord models based on the database schema.

Validacity adds an extra layer of validation objects where all your validation logic can be moved to.

A Rails 3.1 & 3.2 version of Encrypted Cookie Store by FooBarWidget

Verify addresses using SmartyStreets

It allows you to specify validations for method arguments, using `validate_args` to supply validation rules of a hash or array.

Validate SEO-tag format

This Gem is Used for Validations URLs

Allow for validation of only some attributes

Validates Cnpj

Validates CPF

Simple gem helpful in validating standard credit card forms

Help you discover errors early.

Validate HTML files as they leave your app by rack or by mail or by turbo-stream

Add Japanese validators

Automatically adds validations to ActiveRecord models that match your database constraints

Inspired by Airbnb blog post https://medium.com/airbnb-engineering/large-scale-payments-systems-and-ruby-on-rails-bfe5b89f6f4 - by including a module in any of your classes, you can validate the type and presence of a method's parameters.

Validates the given string

Provides a clean DSL to validate params for controller actions.